The Experts below are selected from a list of 78423 Experts worldwide ranked by ideXlab platform
Shu Hui Yu - One of the best experts on this subject based on the ideXlab platform.
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ecological effects of soil salinity regulation through Saline Water irrigation and subsurface drainage in high Water table level area
Journal of Applied Ecology, 2016Co-Authors: Shu Hui YuAbstract:In high Water table level area, Saline Water irrigation in crucial drought periods has been confirmed to have a positive effect to increase crop yield while it may cause soil salt accumulation to have a potential negative effect on next season crop growth. It was supposed that eliminating or reducing this kind of negative effect could ensure a sustainable increase of crop yield under Saline Water irrigation. Field experiments were completed in a 2year period in Nandagang district in coastal area of Hebei Province. We investigated the dynamic changes of soil salt accumulation under Saline Water irrigation in dry season, and analyzed the ecological effect of removing soil salt storage by subsurface pipe drainage system in rainy or proper season. The results showed that the soil salinity experienced accumulation-desalinization-secondary accumulation under Saline Water irrigation in dry season. In the early stage of irrigation, under 1 g·L -1 concentration Saline Water irrigation treatment, the soil salt load was obviously removed in the layer of 0-50 cm, the soil salinity went up with soil depth, HCO3- content increased whereas other ions contents decreased; under 6 g·L- and 13 g·L-1 concentration Saline Water irrigation treatments, the soil salt accumulated in the layer of 0-50 cm, the soil salinity went down with soil depth, HCO3-content decreased whereas other ions contents increased. Leaching effect of soil salt under subsurface pipe drainage system during rainy or proper season was significant. The soil desalinization ratio increased with the rainfall strength, ranging from 16.0% to 45.7%. On a yearly scale, the soil salt accumulation under Saline Water irrigation was lower than that in control area. The wheat yield under Saline Water irrigation was significantly higher than that in control area, and the yield in the treatment of 1 g·L-1 was highest.
Julian Martinez Beltran - One of the best experts on this subject based on the ideXlab platform.
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irrigation with Saline Water benefits and environmental impact
Agricultural Water Management, 1999Co-Authors: Julian Martinez BeltranAbstract:The shortage of Water resources of good quality is becoming an important issue in the arid and semi-arid zones. For this reason the availability of Water resources of marginal quality such as drainage Water, Saline groundWater and treated wasteWater has become an important consideration. Nevertheless, the use of these Waters in irrigated lands requires the control of soil salinity by means of leaching and drainage of excess Water and salt. However, the leaching of salts, soil microelements and agro-chemicals can lower the quality of the drainage Water in the irrigation scheme. The irrigation return flows with Water or poor quality are a source of pollution of the surface Water bodies situated downstream of the drainage outlet. Deep percolation could also contaminate the groundWater. Therefore, irrigation with Saline Water requires a comprehensive analysis even beyond the area where Water is applied. The problem should be treated beyond the scope of the irrigation scheme, taking into consideration the groundWater and downstream surface Water resources of the river basin. Consequently, the sustainable use of Saline Water in irrigated agriculture requires the control of soil salinity at the field level, a decrease in the amount of drainage Water, and the disposal of the irrigation return flows in such a way that minimizes the side effects on the quality of downstream Water resources. This paper describes the guidelines for a preliminary evaluation of the suitability of Water for irrigation and the key factors for salinity control in lands irrigated with Saline Water. Options to improve the quality of the drainage Water, strategies for the reuse of this Water and alternatives for disposal of the outflow are also analysed. The final goal is to obtain sustainable agriculture and maintain the quality of the Water resources in the river basin.
Wang Quan-jiu - One of the best experts on this subject based on the ideXlab platform.
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Application of Saline and Slight Saline Water for Farmland Irrigation
Irrigation and Drainage, 2002Co-Authors: Wang Quan-jiuAbstract:High-efficient utilization of Saline and slight Saline Water is an effective way of easing up Water resources shortage in drought areas. A mount of researches and applications of Saline and slight Saline Water have been conducted worldwide. Relevant research results were summarized, and techniques of reclaiming salt-effected soils with drip irrigation and surface mulch were introduced in this paper.
Liu Hao - One of the best experts on this subject based on the ideXlab platform.
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Status and Prospect of Research on Saline Water Irrigation Techniques for Cotton
Water Saving Irrigation, 2010Co-Authors: Liu HaoAbstract:The safe utilization of Saline Water can effectively relieve the crisis of freshWater resources shortage.In this paper,the main factors affecting the safety utilization of Saline Water and their respective effects are summarized from the aspects of the quality of Saline Water,irrigation methods,soil properties and crop species,etc.The research advance on the characters and mechanism of salt tolerance of cotton,a kind of salt-tolerant pioneer crops,as well as the research status of Saline Water irrigation techniques for cotton are reviewed.On the basis,some problems for further study are discussed according to the safe utilization techniques of Saline Water and its application in cotton planting in China.
K. Choudhury - One of the best experts on this subject based on the ideXlab platform.
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Saline Water Contamination of the Aquifer Zones of Eastern Kolkata
2005Co-Authors: D. K. Saha, K. ChoudhuryAbstract:A number of Saline/brackish Water zones are present in the subsurface around the Kolkata metropolis. Mixing of fresh and brackish ground Water has created environmental problems in certain areas. Vertical Electrical Soundings (VES) employing Schlumberger configuration have been deployed in the eastern and south eastern Kolkata metropolis for delineating the subsurface Saline Water zones. Interpretation of VES data has indicated disposition of Saline / brackish and fresh Water zones at different depth level which would be useful in the ground Water management with minimum risk of Saline contamination. Resistivity surveys have also delineated clay formations, which act as barriers for Saline Water percolation or transmission. Aquifer zone at some depths south of Bhangar canal is vulnerable for Saline Water contamination as large part of this area is occupied by brackish/ Saline Water in the subsurface. It has been found that the area north of the canal does not contain any appreciable Saline Water in the subsurface. It is further inferred that the sea Water was trapped inland in the Holocene times during marine transgression causing salinity of ground Water at several places.
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geophysical study for Saline Water intrusion in a coastal alluvial terrain
Journal of Applied Geophysics, 2001Co-Authors: K. Choudhury, D. K. Saha, P ChakrabortyAbstract:Abstract Geophysical investigations comprising electrical resistivity and shallow seismic refraction methods have been employed in the alluvial coastal belt of Digha, in the Eastern India for environmental study, to investigate the nature and status of subsurface Saline Water contamination. Geophysical surveys have delineated different subsurface geological formations such as dune sand, top sandy soil, Saline sand and Saline clay on the basis of their characteristic resistivity and velocity signatures. It is also inferred from geophysical interpretation that the thickness of the near-surface Saline zone decreases inland away from the shore. Fortunately for Digha, clay layers present at different subsurface levels, which have probable extensions under the sea, have acted as barriers against any large-scale Saline Water intrusion at depth, even though pockets of Saline/brackish zones have been interpreted in the subsurface. Clay formations are predominant up to a depth of about 60 m in the area below which an aquifer zone has been demarcated. A few locales that are already Saline or are vulnerable for Saline Water intrusion have been identified at different depth levels and these zones should be avoided for ground Water development. Further, several comparatively safe zones where ground Water can be effectively exploited, have been delineated in the area. It has been observed that geophysical methods are highly useful in the environmental study for assessing Saline Water intrusion in alluvial terrain even in the presence of thick clay formations.
